SILICON BY SODIUM REDUCTION OF SILICON TETRAFLUORIDE.

Article abstract of DOI:10.1149/1.2127363

High purity silicon can be prepared from the reaction of Na with SiF//4 to form Si and NaF. The SiF//4 is obtained from inexpensive H//2SiF//6 by precipitation and decomposition of Na//2SiF//6. Concentrations of B and P are each in the 0. 1 ppm wt range i